Stuffing-box.



PATENTED FEB. 19, 1907.

P. GIBLOW, SE.

STUFPING BOX.

APPLICATION FILED JULYSI, 1905.

' FREDERICK GIELOW, SR.

un on.

, or cnIoAeo, ILLINOIS.

s 'uFFme-Box,

No. sas es.

Specification of Letters Patent.

Application filed July 31, 1905, Serial Nb. 271,972-

To all whom it may concern.-

, Be it known that I, FREDERICK GIELow,

Sr., a citizen of the-United States, and a resident of Chicago, countyof Cook, and State of Illinois, have invented certain new ,and usefulImprovementsin Stuffing-Boxes, of

. which the following is a specification, and

which are illustrated in theaccompanying drawings, forming a partthereof.

The invention relates to a device for securing a joint impervious tofluids between a movable rod and the wall of a vessel through which itleads.

More particularly the invention relates to such a device in which atight joint is obtained by compressing a quantity of packing materialinto. a chamber or cavity formed in the wall of the vessel about therod.

The object of 'the invention is to simplify the construction andoperation of devices of this kind, to increase the efiiciency andduraing-boxes.

bility, and to provide a joint affording less frictional resistance tothe movement of the rod than has heretofore been obtained;

The invent-ion consists in-the improved structure to be hereinafter moreparticularly described and claimed, and which providesachamber forreceiving the packing material,

having lateral openings through which suitable followers are adjustablyand yieldingly advanced to compress such material upon therod.

A further detail of the invention consists in the use of flake graphitemoistened with water or oil as a packing material in stuff- In theaccompanying drawings, Figure 1 is an elevation, partly in verticalsectlon,

" showing one form of the device applied to the power-cylinder of afluid-motor. Figs. 2 and 3 are-sectional viewson the lines 2 2 and 33,respectively, of Fig. 1. Fig. 4- is a longitudinal section showing amodified form of the device 'fFi-g. 5 is a vertical sectionon the line55 of Fig. 4, and Fig. 6 is a sectional detail showing anothermodification-in the construction.

In Figs. 1, 2, and 3 a detail of the rod of a fluid-motor appears at 10,the device of the invention being shown as employed for pre venting theescape of the actuating. fluid.

, from the power-cylinder 11 betweenthis rod head 12, through which itleads.

and the walls of an aperture inthe cylinder- A steampoi't 13 is providedfor the power-cylinder, and the usual piston-head appears at 14.

On the outer face of the cylinder-head is a box-like casing 15, which ispierced by the piston-rod 1'0. As-shown in the drawings, the walls ofthis casing are formed integral with the material of the cylinder-head12 and are apertured at 16 and 17 to receive the pie,- ton-rod. Thecasing is chambered, as indicated at 18, the chamber being preferably ofrectangular cross-section and extending rod from end to end of thecasing.

A quantity of packing material 19, preferably graphite, is introduced inthe chamber 18 and is compressed upon the sides of the rod bysuitablefollowers 20, shown as twoin number and operating from opposite.directions. Each-of the followers has a rectangular body portion 21,adapted to slide within the chamber 18, and a tapering or wedgelike'face22 for bearing upon the packing .gages the hollow interior of the shankof the corresponding set-screw for maintaining the correct alincmentofthe parts.

To form a seat for the packinghmaterial designed to efficiently preventleakage between the packing and the side walls of the chamber18, thereis provided upon the in 'terior of each of these walls an annularshoulder 28, surrounding the aperture, as 16 The followers 20 areadmated Feb. 19, 1907. 1

in a direction perpendicular to the axis of the 17. This shoulder isconveniently formed by introducing a sleeve or collar'29 into eachof theapertures, such sleeve being of sufficient length to extend a shortdistance into the interior of the chamber 18 and being of too therequired size to loosely receive the rod 10. They are preferably securedin place by having a threaded engagement with the walls of the chamber,as most clearly shown in Fig; 1. I

In settilu, up the device for use the caps packing material introducedinto the chamber 18 in front of the followers 20. The caps 23 arethenreplaced and the set-screws 25 *23 wilL-beremovedand a quantity ofthe 1 turned so as to bear on the springs 26 with the rod and thepacking material.

one or both of the set-screws 25. Preferably there is provided alock-nut upon each of the set-screws for engaging the outer face of thecap 23 to maintain any desired adjustv ment of the parts.

By employing a packing material 19 of mineral graphite, which ispreferably-used in flake form and prepared by moistening with water oroil until it assumes a pliable consistency, a durable joint is obtained,affording but little ,frictional resistance to the movement of the rod.

If desired, the casing 15 may be formed independently of the walls ofthe chamber or vessel out of which the movable rod which it is intendedto pack leads, as shown in Figs. 4 and 5. It is then preferably providedwith a threaded nipple 31, by means of which it may be attached to acorrespondinglythreaded boss 32, formed on the wall 33 of such. achamber. When the device -is constructed in. this form, the cap 23mostconveniently has a threaded engagement with the casing 15,asindicated at 34.

In Fig. 6 the device-is shown as provided with adeaf-spring 35 foradvancing the followers 20 this form ofspring being preferably emp oyedwhen the device is constructed in the largersizes. By providim thefollowers ,with the tapering or wedge like face described a spreadingeffect is. produced upon the packing material, the tendency being tocrowd it toward the intersection of the inner wall of. thepackingchamber and the movable rod, where otherwise leakage would bemost likely to occur. Leakage between i the wall of the packing-chamberand the packing material is further avoided "by means of the shoulder28, against which the packing material is forcibly compressed by the sreading action of the follower.

I c aim as my invention p 1. The combination with a movablerod, of astuffing-box therefor having a chamber crossed by the rod, a packingmaterial within the chamber and a follower operating upon the packingmaterial at an angle. to the axis of the rod and having a wedge-likeface, the

rod.

2. The combination with a'movable rod, of a stuffing-box therefor havingan oblong rectangular chamber crossed by the rod, the longer axis of{the chamber being transverse to the rod and the chamber having openingsat its ends, a removable cap-plate for each of such openings, a plasticacking material within the chamber, oppositely-disposed followersbearing on the packing material, each of the followers having awed-gel-ike face,the edge of the wedge being transverse to the axis of therod, and a spring reacting between each of the followers and one ofthecap-plates.

3. The combination with a movable rod, of a stuffing-box therefor havinga chamber crossed by the rod, a packing material within the chamber anda follower operating upon FREDERICK GIELOW, SR.

Wi nesses':

CHARLES B. GmLson,

E. M. KLATOHER.

edge'of the wedge being transverse to the the packing material at anangle to the axis 7'5

